Heater unit



J. D. HAYNSWORTH HEATER UNI:

Filed Oct. '2, 1922 sasrig; Q INVENTOR I 1 2 Julius ID Haynsworth.

v ATTORNEY Patented Feb. 17, 1925.

JULIUS D. HAYNSWORTH, 01 ST. LOUIS,

IISNURI, ABSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY A. CORPORATION OF PENNSYLVANIA.

HEATER UNIT.

Application filed October 2, 1882. Serial No. 581,785.

T 0 all whom it may concern:

Be it known that I, JULIUS D. HAYNS- won'rn, a citizen of the United States, and a resident of St. Louis, in the county of St. Louis and State of Missouri, have mvented a new and useful Improvement in Heater Units, of which the following is a specification.

My invention relates to electric radiant heating devices and, particularly, to electrio-heating element for drying. printed sheets.

I The object of my invention is to provide a relatively simple, rugged and compact heating element of the radiant-reflector type.

In practicing my invention, I provide a pair of insulating bars located in back-toback relation relatively to each other and hold a helical resistor member against the outer flat surfaces of the bars bya plurality of metal clips, of substantially U-shape, extending through the respective insulating bars. Metal members of channel section engages the adjacent narrow edges of the bars and are held together by bolts and nuts adjacent to the outside ends of the flat insulating bars. The built-up heating element is located in, and suitably secured to an elongated metal reflector member.

In the single sheet of drawings,

Figure 1 is a view, in side elevation, of a device embodying my invention; I

Fig. 2 is an end view of a device embodyin my invention, mounted ina reflector;

Fig. 3 is a view, in cross-section, of a device embodying m invention, taken on the line IIIIII of ig. 1, and

Fig. 4 is a fragmentary view thereof, in longitudinal section, taken on the line IV IV of Fig. 1.

An electric-heating element, designated generally by the numeral 11, comprises a pair of co-extensive flat bars 12 of a suitable electric-insulating material, such as asbestos lumber, having their flat sides located inback-to-back relation. Metal members 13, of substantially channel section, engage the outer narrow edges of the members 12 and extend a substantial distance therebeyond.

A resistor member 14 comprises a helically-wound resistor wire, such as nichrome, which is held against the outer flat surfaces of the respective bars 12 by a plurality of metal clips 15, of substantially U-shape, the

' intermediate portions of each of which operatively engage one of the turns of the resistor member 15 and extend through suitthe position illustrated particularly in Fig.

1 of the drawing. An opening 17 is provided in each of the flat bars 12 so located therein as to register with each other, permitting the resistor member 14 to extend from one outer surface of the supporting bars to the other outer surface thereof, substantially as illustrated in Fig. 4 of the drawing;

Suitable terminal members are provided at one end of the two parallel bars 12 and may severally comprise a bolt 18 and a plurality of nuts 19.

The ends of suitable supply-circuit conductors, not shown, may be connected to the terminal members in a manner well known in the art.

Each of the channel members 13 is provided, adjacent its ends, with an opening 21 through the central portion thereof, and a bolt 22 extends throu h the two channel members 13 at each em? of the bars 12, nuts 23 and washers 24 being provided thereon in order to securely clamp the two members 13 against the outer narrow edges of the two bars 12.

A reflector member 25, which may be of any suitable or desired shape in-cross-section and of a length to co-operate with the heating element 11 or with a plurality of such heating elements located in end-to-end relation, is provided and may be secured in proper operative position relatively to the heating element 11 by the bolts 22 and the outer nut 23 on each of the bolts, This assembly is illustrated more particularly in Fig. 2 of the drawing. If desired, the bolts 22 may be made of suflicient length to extend a substantial distance through the reflector member 25 to permit of mountin the heating element and the reflector in t eir pro er operative positions relatively to the evice with which they are to be operatively associated.

In assembling the heating element, the helically-wound resistor wire is suitably secured over one-half of its length to one of the-fiat bars by a plurality of securing clips 15, after which the free or unused portion thereof is threaded throu h the openings 17 with the two bars 12 heltl in a spaced-apart relation to permit of the second set of clips being placed in their proper operative positions relatively to the second bar. The two bars are then placed together, substantially as illustrated in Fig. 3 of the drawing, after which the members of channel section may besecured thereon and the terminal'members mounted on the insulatin bars with the ends of the resistor mem r connected thereto.

The device embodying my invention'thus provides -a relatively simple, inexpensive, easily assembled and rugged heating element of the radiant-reflector type, which may be easily and quickly secured in its proper operative position relatively to the device with which it is to be associated.

Various modifications andchanges maybe made herein without departing from the spirit and scope of the invention, as defined in the appended claims.

I claim as my invention V 1. A heating element comprising a pair of parallel-extending fiat insulating bars, and a helically-wound resistor member secured against the outer fiat surfaces only of the two bars and extending longitudinally thereof. a

2. A heating element comprising a pair of flat insulating bars, the flat surfaces of said bars being located in spaced-apart,,parallel and co-extensive relation to each other, and a,

resistor member secured against the outer flat surfaces only of said pair of bars and substantially co-extensive therewith. I

3. A heating-element comprising a pair of co-extensive flat insulating bars, the flat surfaces of'which are located in parallel rela-v tion to each other, a resistor member secured against the outer surface only of the two bars, means operatively engaging the narrowedges of the bars at each side thereof, for holding them in proper operative posi-" tion relatively to each other, andmeans extending through said spaced holding means outside of and adjacent to the ends of said bars for securing said holding means in proper operative positions.

4. A heating element comprising a pair 'of co-extensive flat insulating bars, a resistor member'located against the outer flat surfaces. only of the two bars, members of channel section operatively engaging the subscribed section outside of and adjacent to the ends of said flat bars. I

5. An electrical heating device comprising a pair of co-extensive flat insulating bars, a resistor member located against the outer fiat surfaces of said bars, a reflector substantially co-extensive with said flat bars, and means for securing said bars in proper operative relation to each other and in said reflector. 1 I

6. A heating element comprising a pairof co-extensive and parallel-extending flat bars of electric-insulating material and a resistor member secured against the outer fiat surface only of one of said bars, said resistor member comprising a relatively small helix extending lon 'tudinally of the bar at the middle thereo 7. A heating element comprising a pair-of flat bars of electric-insulating material, the. flat surfaces of said bars being located in closely adjacent," parallel and co-extensive relation relatively to each other, and a resistor member comprising an elongated helix of relatively small diameter secured against the outer flat surface only of one of said bars and substantially coextensive therewith.

8. A heating element comprising a pair of coextensive flat insulating bars, a helically I wound resistor member located against the outer flat surfaces only of the 'two bars,

members of channel section operativelyena means. v p 9. An electrical heating device comprising tively to each other and to a supporting a pair of coextensive flat insulating bars, a

resistormember located against the outer flat? surfaces only of said bars, members of channel section operatively engaging the narrow edges of-said bars, a reflector, and bolts extending through said members .of channel section outside of and closely adjacent to the ends of the flat bars an'dthrough said reflector for holding said bars in proper operative position relatively to each other and in said reflector. Y p

In testimony whereof, I have hereunto my name this 20 day of Sep., 1922.

' JULIUS D. HAYNSWORTH. 

